© 2007 Cisco Systems, Inc. All rights reserved.Cisco Public 1 Version 4.0 Living in a Network Centric World -Tại sao phải biết về mạng ? -Học mạng là học những gì ? -Cơ hội nghề nghiệp

2 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public How Networks Impact Daily Life  Network supports the way we live

3 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public How Networks Impact Daily Life  Network supports the way we learn

4 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public How Networks Impact Daily Life  Network supports the way we work

5 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public How Networks Impact Daily Life  Network supports the way we play

6 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Data Networking Role, Components, and Challenges  Describe the various elements that make up a network –Devices These are used to communicate with one another –Medium This is how the devices are connected together –Messages Information that travels over the medium –Rules Governs how messages flow across network

7 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Data Networking Role, Components, and Challenges  Describe the role of converged networks in communications –Converged network A type of network that can carry voice, video & data over the same network

8 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public  Học mạng là học những gì? Network Structure

9 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Structure  the components of a network Devices Media Services

10 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Networking Career opportunities  Cơ hội nghề nghiệp

11 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Networking Career opportunities  Traditional IT: programmers, software engineers, data base administrators and network technicians. Now joined by new titles:  Network architect (Kiến trúc mạng)  e-Commerce site designer (Thiết kế Website thương mại điện tử)  Information security officer (Chuyên viên an toàn thông tin)  And home integration specialist (chuyên gia tích hợp hệ thống gia dụng).

12 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Network Architecture Characteristics  Describe basic measures to secure data networks –Ensure confidentiality through use of User authentication Data encryption –Maintain communication integrity through use of Digital signatures –Ensure availability through use of Firewalls Redundant network architecture Hardware without a single point of failure

13 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public